Wizardry 8 is very different compared to the previous games. It is pretty fantastic though once you find a suitable mod for speeding up enemy turns.
Wizardry: Tales of the Forsaken Land (PS2) is also quite different, especially in terms of exploration and combat. It's still very much worth a look if you can hunt down a copy.
Wizardry: Labyrinth of Lost Souls (PS3) I didn't particularly care for:
http://www.the-nextlevel.com/review/psn/wizardry-labyrinth-of-lost-souls/
Wizardry 1-7 though....hmm. Honestly I've spent more time with the games that emulate Wizardry than Wizardry itself. The console ports of the first few games sound preferable based on the impressions in this thread. If it's possible, I'd start there. Otherwise I recommend jumping ahead a few generations and getting Elminage Original (PSP/Vita) and/or Elminage Gothic (Steam). The Elminage games are pretty heavy classic Wizardry-clones. They feature fantastic art, and at times some brutal encounters (though you won't have to worry about back-up juggling to preserve your precious characters). Most of the other "fun" aspects are preserved, like trap-chests that cast a teleport spell. If the spell just happens to teleport you into a wall...well your party is wiped out.
By the way, I can't say I'm very happy about Gothic bombing. Steam is already lacking in terms of D-RPGs.
The Dark Spire (DS) is another Wizardry-clone. It features some neat art and a good soundtrack. It has a bit of a slow start though, which is the reason why I dropped the game early on. I should revisit it, but the prices have become much less reasonable.
Underneath the sci-fi high-school craziness in Operation Abyss (Vita) is a Wizardry game. There are a lot of unique sub-systems that give this title a lot of flair, and it's really quite enjoyable. Now that I've finished the story in *banned D-RPG* I'm going to dig deeper into this title.
I'll also say that Final Fantasy 1 has a lot in common with classic Wizardry. Ignoring the obvious differences, the spell-level system still remains, there can be practically unfair battles (get back-attacked by a flock of cockatrices = game over), and the limited class-system is pretty similar as well.
There are some other titles that are less Wizardry, but still do a damn fine job at providing a D-RPG experience:
Might & Magic series: The early games (1-5) are standard grid-based titles, 6-8 change things up quite dramatically (still worth playing though), and 10 is a return to the basics and is overall highly recommended.
Etrian Odyssey (DS & 3DS)
Demon Gaze (Vita)
Stranger of Sword City - Yeah it's import-only for now, but there is an Xbox One release in the works, and it's guaranteed to be localized. NISA might go ahead do a US version of the Vita title around that time as well. Definitely one to look for.