As an avid motoring enthusiast, and former owner of a Honda Civic, I would suggest getting the GTI.
Theirs nothing inherently wrong with the Honda Civic, my big complaints with them is that the new ones are sort of half-assed. Also with the new styling its brash and noisy, it lakes subtlety or (because of its popular following) sophistication. The coupe looks alright, but you see them everywhere!
The GTI feels like how ALL hot hatch backs should be. It looks good yet its classically beautifully. If the Honda Civic is the Space Needle, the GTI is the St. Louis arch. On top of all that it is a JOY to drive. When you drive it its like its telling you " Go on, go on!" begging you to downshift pound on the gas, and surge ahead. Speaking of shifting, the DSG automatic gear box is magnificent. I I hate "push to shift systems" because their always connected to an automatic transmission and I'm of the opinion that torque converters where invented by the US government to take away our fun. The DSG gear box is actually a computerized manual, and it works! WELL! Not kind of not barely, WELL! its more practical than a coupe, and it's the most fun out of all the other cars you mentioned.
The Accord is alright but its sort of like carpet, its just sort of a car, and that's about it. Living up to its names sake, its just agreeable. To sum up adequate and boring, and it's more of the same with the Jetta, more torque is good, and it looks alright. But as a man a coulden't drive it. if your a woman its ok but the 4-door GTI is still the better choice.
But the only person who can make the final call is you, and to help you better make that decision, Here's a fat British man on both.
GTI:
http://www.youtube.com/watch?v=1belkkKAJXI...feature=relatedCivic:
http://www.youtube.com/watch?v=CvQ0m0hU-8kAlso, before I get any crap, that is not being released in the US, but keep in mind that the current SI is slower, so its still a valid comparison (at least of the points I made).
Maybe I'm doing it all wrong, maybe I shouldn't be focusing on gearboxes or lap times or suspension systems. Maybe I should be focusing on the other side of motoring. driving to work, picking up your date, cruising, maybe even some skirt chasing. Style, class and comfort. Because for the same price and suffering from just a touch less reliability... You could get something completely different. The Volvo C30...
http://www.volvocars.com/us/models/c30/Pages/default.aspxYou may think I'm crazy, but think of being in traffic looking around and saying to yourself "Lets see who elce has got one of these, NOPE, its just me. Its essentially a luxury hot hatch back. If the GTI is Cindy Crawford, the C30 is Coco Chanel. its probly quieter than the Lexus also.