Absolutely none of them!
To take unguided pictures at 1250mm f.l. you need a bloody good mount, especially because it is a f/15 telescope.
Those devices are designed to take moderately short exposures at very low focals with very fast lenses: your f/15 is 5 stop slower than a f/2.8 lens, meaning that, to get the same amount of signal you would attain in the f/2.8 lens, have to get subs 2^5 longer...
To use the 90/1250 you would need a larger mount (at least eq3/cg4, but bigger is better) and the equipment to guide (manual, or, better, auto), but it is not a really good setup to begin with, and in general term not a good setup overall.
If want to start with AP, I'd suggest to use your camera with standard lenses instead (conventional approach), or stick with you have and try a sort of lucky-imaging with heaps of very short, high ISO, subs