since you are looking for a good street set up and not interested in racing too much then i would say go for a build/swap that gives you a good amount of low end torque and good mid range.
The LS and B20 are very good for this. And as NAs they are ones that are low maintenance and will last.
On the B20 a little head work, some cams, the right transmission, and a good tune and you'll more than likely be
when you step into the gas.
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if you can only race me in a straight line then whats the point 
...91 SMF SCCA
http://www.flickr.com/photos/8341770@N07/5601083432/http://www.flickr.com/photos/8341770@N07/5601083432/ by http://www.flickr.com/people/8341770@N07/, on Flickr
I see people out there spending money on the car to improve it … If you spend half that effort just working on your driving skills, making you and the car work together as a team, then you’ll go faster – period. To make the car go a second faster on the track takes a lot more energy and money than making yourself drive it one second faster.
– the late Tom Thrash SCCA Solo E Production