Vga and CPU fans

I bought few months ago a lot of excellent delta (Fonosan) fans 40x40x20mm, and i use them for vga cooling solution for clients which their vga fan is dead and they seem to be heavy duty fans up to now (1/2 year from the first installed - no problems).They do not have RPM monitoring (only 2 cables), and they operate at 12V.
I want to buy another fans which are from the same manufacturer (Delta):

http://cgi.ebay.com/ws/eBayISAPI.dll...PcY_BIN_Stores

they are 50x50x10 as you see, and DO have RPM monitoring option (3 cables to the board), and they are thinner, which gives me solution when there is a problem with space (between vga and next card).
What i want to know is if someone have good experience with this product, because i want to use them as a replacement for pentium 3 + pentium 4 423 pins (up to 1.7GHZ).
What do you think ?
Will they be good for this porpuse ?
Thanks

I've used a few with no problems, but never on a large scale

Thanks

Quote:

Originally Posted by Radical Dreamer

I've used a few with no problems, but never on a large scale

I'm talking here about 5 a month.....wanting it to work good for a year....
I give 3 monthes warranty on fans, but i want them to live at least for a year....you know...reputation.....