And if your not into DIY there was one company i saw on Astromart who provide you with all the bits and bobs to convert your dob into a trus desing.
Here is a link
http://dobstuff.com/
Also if your set on a not-dob option then perhap the best bet is to for a LX90 8" or Nexstar 8SE. Alternatively the Skywatcher 8" SCT EQ5pro from Andrews is a good combo at a good price relatively speaking. Look in the clasfied some good Lx200's are turning up there recently. But for portability 8" is great, the 10" SCT fork mounted start to get a bit heavy, but still fairly portable.
I went from a 10" dob to a Lx90 and it was the scope i used most. Even my G-11/C8 setup now does not get as much use as the LX90 did. It was just so portable.