Not used many waxes except for Zymol, which are all easy to remove and leave a great finish, but they unfortunately are out your budget even for the entry level one. Have you considered Finish Kare Pink wax ? (Less than £20 ), in a massive tin that will last you forever and its really easy to use (as long as you follow the instructions) and it leaves a really great finish in my opinion.
I have moved away from waxes now that Im older, I used to enjoy it when I was younger, but now I find it more of a pain. I solely use spray on sealants now, as they are just easier and deliver a better end result for me. My current one Im playing with is WOWOs crystal sealant, which now that i have tried it, I really rate it, its supposed to last a long time too, but I have not had it on long enough to verify it myself, it definitely makes the paint pop more than anything else I have tried. One thing I have noticed though and it may just be a coincidence, but the car is staying noticeably cleaner. Whether thats the Crystal Sealant or not is another question. I want to try Garage Therapy Sigma next as heard good things about that too, then ceramic coatings, then... It never ends lol