Any particular reason you don't want to do any cutting? Are you installing them yourself or having a pro do the install?
I had my Polks installed at Tweeter, Etc. and a small amount of trimming was required in the speaker cup area but nothing major. I thought about going with the components but decided against it because I didn't want cuts made where they would be visible if the speakers were removed.
You may be able to install the tweeters in the small triangular area near the front of the window and have them affixed with a strong 3M adhesive that could be removed later with solvent.
My Polk MMC-650s sound fantastic IMHO and coupled with a matching pair in the back and an Alpine 200 watt 4 channel amp the system is almost complete. I'm resisting the urge to add another Alpine amp!