Weegee, I'd say go ahead and get The Dark Spire if you happen to see a copy at your local game store, but see if you can find a way to try Strange Journey before you buy it. The Dark Spire is pretty cheap now (I got my copy for four bucks) and is a fun Wizardry-type JRPG, but while I think Strange Journey is excellent in almost every regard, certain aspects of it may turn you off.
As for Dragon Quest IX, see if you can get some friends to buy it so you can all spend ten hours a day playing co-op quests.
And, seriously, buy a PS2. Not just for RPGs, but also for everything else.