Dry Suits

[DRE]

Rockboots are great if you intent to do a lot of walking on rough terrain with your suit - otherwise any ol' boot will do. In fact, the old turbo sole from DUI had certain advantages, such as ankle flexibility and smaller fit compared to the new rockboot system.
I'd definitely recommend two pockets, preferably with velcro instead of zippers (zippers can get stuck, velcro you cal always open), and a P-valve.
As for thermals, fleece undergarment can be had in a wide variety of thicknesses and prices, and usually will do an adequate job at keeping you warm. Once you get into deco diving I'd highly recommend getting DUI's 400g Thinsulate: it will retain 80% of its insulative quality when completely flooded if used in conjunction with argon, something no other garment will do for you (beware of cheap knockoffs). Definitely money well worth spending...