I'd take the advice given by the folks who responded to the original post.

You're only $20 into the scope so refiguring and recoating the mirror is a piece of cake...the mirror was basically free!

Upgrading the rest of the scope can be done over time. JosephR has appears to have done a masterful job with his. Use that as an inspiration.

You might also want to take a look at http://www.dobstuff.com for an alternative path to take.

I've been looking for a Coulter dob for some time now. Looks like you've struck gold while my poke is still empty.