correct me if i am wrong, but don't the stock speakers have inverted surrounds? (i might have made up that word), but by this i mean the woofer surround is curving downwards (opposite of those ones). i forgot how the stock ones look. but if they are similar then those should be fine. the mounting points on those look to be thin metal and therefore won't have the same problem.

one other thing to keep in mind tho. the stock speakers are not 4x6. they are some weird 5x3 1/2 or something like that. so i might have been able to pull mine off because i ahd "separate" aka plate speakers where there is a tweeter and a round 4" woofer. the 4x6's u are looking at have oval woofers (and they have more cone space and should sound better than mine, mid bass wise). anyways the way i trimmed mine i did not make them into an "oval" shape. but a tear drop shape. i suggest u should go to walmart and buy those cheap 4x6 that are like 3 bucks and test them. good luck.