Very Durable Gbb

Hey everyone! My ppk has been wearing down a bit, and I have a few broken pieces in the slide, although it still works. My biggest problem is that the magazines seem to leak after around 3-4 months of use. And I do oil my mags. This being said, I'm looking for an all around extremely durable gbb pistol, but not too expensive either. I have been searching frantically, and I think I've found 2 good bets so far. Here is what I have so far.

http://www.airsoftgi.com/product_info.php?products_id=3033

That is the Kjw full metal m9 pistol

http://www.airsoftgi.com/product_info.php?products_id=3134

That is the Kjw full metal m9 tactical
Keeping in mind the quest I laid out on the top of my post, I'm wondering if there is anything different with the m9 tactical from the regular m9 except the rail underneath the slide, and the handgrip with the finger holds. If anyone could help me with these two problems, that would be great. Thanks.

i've heard the KJW M9 leaves a lot left to be desired......KWA M9's are so , so i hear

Does it have to be a M9 cause theres other models that you can drop or use many times and very little wear shows. For example the WE tech or similar brands 1911 is suppose to be fairly rugged.

I have a KJW M9, the tac master to be exact.
I love it, but installing the rubberized grip, the hammer trigger spring came out, and I have no idea how to reassemble it, so thats a huge pro... Other then that everything else is fine

Thanks for all of the suggestions! No the type of gun I want doesn't have to be an m9, those guns are just the ones I found so far. Insane mercc if you could post some links of those 1911's that's would be great. Also links for more durable guns would be appreciated. Thanks

OK this is a link to the WE tech page on ASGI. theys alot of nice GBB 1911s
http://www.airsoftgi.com/index.php?cPath=139_25_130&osCsid=94ki92m7u013aknfg8vvncls00

This is the one im going to purchase http://www.airsoftgi.com/product_info.php?cPath=139_25_130&products_id=1729