I vote for keeping the 1LE and modding and tinkering with it for fun. The Vette has more prestige yes. There are always nicer cars, nicer houses, etc. How about a Porsche GT3? Wait for the Gen6 Camaro? How about the next GT500 (or will be called GT350) on the new 'Stang chassis?
Your 1LE has speed by the numbers, but from what you are saying you want more pick up. Could 4.11 gears do that?