Switch to MH from T5?

[micrors4racer]

I have a 10G nano thats been running since December 2009. It has LPS and monti caps. Ive been using a FishNeedIt 2 Lamp 24 inch T5HO setup with the crappy stock bulbs in it since January. I think it has come to change to change the bulbs to ATI Aquablue and Blue+ but at the same time I don't think this light is enough for the tank. I already outgrew my tank and I'm thinking of switching to a 20G (can't really go bigger due to space constraints) and that would require me to get the 4 lamp fixture along with $80 worth of ATI bulbs or should I switch to the FishNeedIt 150W MH pendant? What would be the pros and cons? How much do MH bulbs usually run for?

Here are current pics of my tank

http://img.photobucket.com/albums/v446/micrors4racer/DSC00164-1.jpg
http://img.photobucket.com/albums/v446/micrors4racer/DSC00165.jpg
http://img.photobucket.com/albums/v446/micrors4racer/DSC00166.jpg

[McCrary]

MH's are expensive to run and the bulbs are expensive to replace, not to mention the heat issue on such a small tank. I would stick with T5 lighting.