Garnet,
For PC you could try Blackmagic Design’s HD Link. Does a similar job as MXO when using Dell/Apple 23-24″ displays. Interlacing isn’t as good as MXO – but if it’s a feature film you shouldn’t be working with fields anyway.
Of course a SONY CRT or high-end pro LCD would be your best bet via SDI, but this workflow should do you ok. Certainly better than trying to CC directly from your PC monitor!
Just out of interest…if you’re using FCP then why are you CC’ing in After Effects on a PC? Have you tried Color that ships with FCS?
If you want a HDLink a bit cheaper I have one I’m not using if you want to buy it.
AE7 Pro – Nucleo – Mocha v1.2.0 – PS CS3 – FCP 5.1.4
MacPro Quad 3GHz / ATI 1900XT / 8GB RAM / OSX 10.4.11
30″ ACD / Wacom Intuos 3 A4 / XServe RAID
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Production Studio CS2 – Combustion 3 – Mocha v1.0.1
Win XP Pro 32 / Intel P4 3GHz / 2GB RAM / GeForce FX5200 / DeckLink Pro / Roland DS-5s / Sony BVM-20G1E / 2 x Dell 2007FP / Wacom Intuos 3 A4 / 110GB/80GB/600GB RAID-0