Hi Maverick,
I have an SW135 and don't recommend you buy one, as they are a BUGGER to collimate properly and the catadioptric lens and spherical mirror combination are the issue which you can never get rid of. They do make a 130 x 900P, P stands for PARABOLIC version which has a longer 1000mm tube and by all accounts this one is quite a deal better. If you are stuck on getting an EQ mounted small scope, the SW500 (150mm or 6 inch) newtonian has a parabolic mirror and an Eq3 mount which are better than the SW135's EQ2 and you do have the option later on of fitting the goto upgrade kit to the EQ3 which the EQ2 cant do.
For a 5-6 inch scope they do OK, but for the same amount of money you should be able to get a 8 inch dob which is a much better choice.
The EQ2 tripod my SW135 is on does have an RA clock drive but its not that flash for astrophotography, visually its good, but then again, if its visual you are after, an 8 inch dob is the way to go.
Cheers
Chris