If you really need shoulder mount, get shoulder mount. The problem is, it’s only good for shoulder mount or tripod mount — too bulky, most likely, for use handheld, or on Glidecam/Steadycam. Particularly light ones such as those you’re looking for.
I think the Panasonic AG-AC7 is a mixed bag (I’m a Panasonic guy these days, too… but read on). It’s definitely a consumer-priced shoulder mount… Panasonic always has one of these. This is an update of the AG-HMC70, pretty much.
And it was the fairly unique property of being a flash-based model that can shoot either in AVCHD or plain old timey DV — to standard SDxx memory cards. But with all that bulk, you’re still stuck with a 3.5mm mic input — not XLRs (the HMC70s one saving grace: XLRs). It only does 60i, which is kind of retro these days; sometimes you want 60i, but I’m shooting far more 720/60p or 1080/24p these days. If your main target is DVD/BD, 60i isn’t a big deal.
Of more concern is the single 1/4″ CMOS sensor. Nothing wrong with 1/4″ CMOS sensors — each of my Panasonics has three of them. But just one? That’s a consumer imager there, and you will suffer in low light. Curiously, the HMC70 was a 3-chip camera… my main complaint was that it was limited to something like “HG” mode, 13Mb/s or so recording rate. The AG-AC7 also supports Panasonic’s HA mode, which is their top-level consumer mode (other than on models that support 1080/60p recording), at about 17Mb/s.
You’ll spend a bit more, but I’d definitely take the AG-HMC80 over this. But it’s nearly twice the price, about $2200. The advantage: this is a real AVCCAM model… it’s 3-chips, XLR inputs, better glass, full range of recording rates and options, including PH mode (21Mb/s VBR), and a bunch of options in SD, as well.
Which brings me around to recommending one of my cameras, the Panasonic AG-HMC40. This is nearly identical (same sensors, modes, lens) to the AG-HMC80, but without the shoulder mount… it’s a smaller handle-mount camera, like the Canon GL-1 was in its day. You certainly could put it into some kind of shoulder rig, just like the Canon, but it’s not a shoulder camera. And I’m not entirely in love with the viewfinder, though I’m not sure the HMC80 or AC7 win prizes here, either. You can buy the AG-HMC40 for $1700-ish… XLR inputs are an add-on (via dedicated port with lock, not 3.5mm jack).
Not sure which Sony you were looking at… maybe the Sony HXR-MC2000U? That’s a $1750 shoulder mount AVCHD model, which seems to be exactly Sony’s answer to the AG-AC7. This is also a single-chip, 1/4″ sensor camera, which Sony’s top consumer encoding AVC modes (which go up to 24Mb/s… Sony always quotes peak rates, Panasonic always average, so they’re closer than they look, but Sony’s got the edge), interlaced-only video modes, 1080/60i or 480/60i, just like the AG-AC7. Also has audio in only via the 3.5″ mic input.
As before, I wouldn’t personally choose this. If I absolutely had to have shoulder mount, I’d choose the AG-AC7… I think it’s pretty similar to the Sony, but cheaper. At the price of the Sony, I’d buy the HMC40, hands down.
Another possible choice in this price range is the Canon VIXIA HF G10. That’s about $1500, and yeah, it’s a single-chip only model. However, it’s essentially the same (consumer version) of the $2000 Canon XA10, lacking the XLR module. This has the same sensor as the XF100 and XF105 (and the even more expensive XF300/305 use three of these sensors), it’s a very modern and larger 1/3″ sensor that seems to be getting very good reviews. I’d look at it, but it’s going to be very small, so maybe not what you’re looking before. Prior to the Panasonics, I used a Sony HVR-A1, which was a similar model in its day — single chip, but pretty good for a single chip camera.
-Dave