ST engine swap, Which should I do? Options

[My94RedCelica]

I have a 94 ST and my 175000 mile stock engine has seen it's last days. I'm not sure what to do about replacing it. a 3sge or 3sgte is out of the question. I've been considering doing a 4age black top, but it's quite costly. Is it really worth the money to go for the black top or stick with the cheaper silver tops? The 4agze seems to be a little more work than the others so I'm not sure if that's the route that I want to go.

[My94RedCelica]

I would like something that drops right into what I have right now and don't want to go through the hassle of changing a lot of things, mainly the reason I'm sticking with the 4a series. Money's not a really big issue with it, but the prices that i've seen for a 3s is a little more than what I'm willing to spend on a swap. I've possibly thought about a 4agze too. Isn't that a matter of just swapping the engine and tranny? Basically what i have going on here is a show car that needs a new engine. I probably won't be doing a lot of racing in it but I want something that 1. Will have more power than my 7afe and 2. Look better for shows. The 4A series seems to be my best bet for this. Since I'm already going to invest around 800 in a silver top, was just looking to see if it's worth to invest a little more into a black top or a 4agze. Is there any reason besides scarcity that people don't do blacktops?