Hi Vesko = Quick questions for you. (Put aside the Celestron /Meade issues)
Are you asking about just the OTA, or an integrated mount /scope? Both companies offer a massive range nowadays.
I have a Celestron 6 SCT that I am very happy with for my purposes (read:beginner). But the computerized mount it came with is sitting in my closet. Practically unused.
My Celestron 6 currently rides a Skywatcher HEQ5 mount with GSO guide scope and Synguider, and soon to come Atik ccd. (Thanks Santa)
The original mount (alt az) on the c6 just couldn't cut the long exposure time for astrophotos I was after, even after I triple checked with the aus supplier. They swore black and blue an alt az mount could be used out of the box for long exp. a/photos. Bull! (Note this is before I found this terrible money wasting forum and hobby!)
I guess my point is, get a tube you want (based on the optical side of things you seek ( observing vs. astrophoto etc) but make sure you end up with a mount that does what you want to, in the long run also (figuring in weight from cameras, guide scopes ....)
No good spending 2000-5000 on a scope and mount, only to put half of it away and then have to buy something else.
Can't help with backup from suppliers. Have had no need so far.
Pm if you want a pic of my scope setup re a 6se on a heq5.
Hope this helps
Cheers jez
Pps last minute advice. Save for two years or so and buy a c11.