If you've never used one before, a tablet will revolutionise your Photoshop/2D/postwork. Here in the UK, I can only afford a cheap one - Aiptek.  Watch out for Aiptek though - the tablet works fine, but the pen monitoring software (ATWUSB.EXE) seriously conflicts with Poser and causes Poser to crash each time I try to load it.  If I disable ATWUSB.EXE before launching Poser it's ok, but it's a pain and then needs to be relaunched when you want to use the tablet.  I've given up producing any artwork now, but if I ever start again, I consider a tablet to be a must for postwork. 

My self-build system - Vista 64 on a Kingston 240GB SSD, Asus P5Q Pro MB, Quad 6600 CPU, 8 Gb Geil Black Dragon Ram, CoolerMaster HAF932 full tower chassis, EVGA Geforce GTX 750Ti Superclocked 2 Gb, Coolermaster V8 CPU aircooler, Enermax 600W Modular PSU, 240Gb SSD, 2Tb HDD storage, 28" LCD monitor, and more red LEDs than a grown man really needs.....I built it in 2008 and can't afford a new one, yet.....!

My Software - Poser Pro 2012, Photoshop, Bryce 6 and Borderlands......"Catch a  r--i---d-----e-----!"