deciding on an engine to swap. HELP!, currently 7afe, but wut next?? Options

[cjh4l22]

OK so here's the scoop. currently i have a 95st w/5spd and a 7afe engine that is leaking a little oil and has just under 260k on it. so, by x-mas i'd like to swap it w/something b/c i'm afraid the engine won't make it till summer plus i'm asking santa for x-tra power this christmas. lol SO I'm asking for info from the wonderfully knowledgeable ppl here on 6gc.net I need to know which engine would be my best choice based on the following criteria... a) ease of the swap b) power gained b/c like i said, i would like an increase c) ease of turbo later and d) cost effective. b/c i have been considering a 3sgTe but it just seems too expensive for a poor college student. furthermore, i was hoping for something w/an equal if not higher displacement than the 7afe (1.8L) but i have heard good things about the 4age(20v) which is only 1.6L. If anyone would be willing to enlighten me, please do so and i'd be forever greatful. thanks.

Oh, and no i don't plan on racing this car or anything, just building up a car thats got some guts, ya know? something w/some spunk. anywho, thanks for your help.