Yamaha DTXpress/DTXplorer/DTXtreme

Ok, I have a few systems within my price range...wonder what you guys 
think about them. They would be used for band monitoring, and 
possibly for smaller venues.

Nady MPM4130 PA210 Package
http://www.samedaymusic.com/product--NDYPA2

Nady MPM4130 PS112 Package
http://www.samedaymusic.com/product--NDYPA3

Passport P150 Portable System
http://www.musiciansbuy.com/PASSPORT_P150_.html

Audio Choice by Sound Tech C100 Portable PA System
http://www.musiciansfriend.com/srs7/sid=040408063227064202106058810989
/g=live/s=packaged/search/detail/base_pid/630130/

Squier 4-Channel PA System
http://www.musiciansfriend.com/srs7/sid=040408063227064202106058810989
/g=live/s=packaged/search/detail/base_pid/608003/

Kustom KPA804 PA Package
http://www.musiciansfriend.com/srs7/sid=040408063227064202106058810989
/g=live/s=packaged/search/detail/base_pid/632200/

Has anyone had experience with any of these systems? Or if anyone has 
knowledge in this area, please tell me what you think. Please give me 
your honest and sincere input, it would be very helpful to me. I 
should be able to get my DTXpress II/III SD system in about 4 weeks 
so I'm happy about that, but I have to find a package I can use for 
some sound that's not weak, but also isn't the $3000 professional 
packages either. Thanx for any input.