Depends what you wanna do with your car. You slap on a huge turbo and spray to spool for a drag car or keep it low spool for quicker and more predictable response for track/street
MR vs RS, the RS was a stripped down car made for people who were more than likely gonna turn it into a track/rally car. No abs in the RS either
The 6 speed is not as strong as the 5 and is often converted, there are kits that you can buy to due so. Many have revised gear ratios as well
I owned a boosted Integra that was just as fast as the Evo I own now but was no where near the fun or gave the joy the Evo does