G,day Patrick and welcome
Collomating a f5 newtonian telescope is not too difficult once you have done it a few times. A faster telescope will need collomation more than a slower one and you will need to be more precise but it is not a huge inconvenience. There are several gadgets that can help you collomate like a cheshire eyepiece and if you want to spend a bit more a laser collomater. I have both but I prefer the simple cheshire.
As for which telescope to get? If you want something reasonably portable but with descent aperture I would reccomend a 150-200mm newtonian on a Dobsonian mount (simply called a Dob). They are inexpensive and a joy to use. The 150mm(6") Dobs are usually f8 and the 200mm (8") are about f6
