The best garden tillers and cultivators
Troy bilt and Mantis build some of the best tillers but it's good to have a list of your specific needs before shopping too much. There are quiet models, and models that are harder to start and tillers that don't till deep enough, etc.
How tough of a tiller do you need?
There are a lot of mini garden tillers and cultivators that should work well for you. The Mantis 7262 model works well for many and can till deep enough into the ground and handle small rocks, etc. Mini tillers like the Mantis 7250 are usually reviewed very well by customers as the 7250 is able to till deep and in narrow rows and spaces. It's also easy for storage. It folds up nicely.
Watch out for loud tillers!
Some tillers seem to be just too loud and too bouncy. These garden tillers and cultivators are very powerful but fairly light. You probably won't get worn out pushing it because it isn't heavy, but you may want to get a pair of good gripping gloves to help you hold down the tiller if it gets bouncy.
Electric or gas powered garden tillers and cultivators.
You may be surprised to find that there are battery-powered cultivators that may be able to get the job done for you just as good as a gas powered one. It depends on the job and your yards needs, but sometimes an electric cultivator may be easier to maintain than a gas powered cultivator.
The Black and decker Gc818 18 Volt cordless electric garden cultivator is very convenient yet functional. It's inexpensive and it weighs only 8 pounds.
The Sun Joe TJ600E Tiller is another electric cultivator that may be right for your needs. It's another lightweight yet powerful tiller that you need to keep a good grip on and it will help you tear up your garden to get the soil ready for planting and seeding. Just be sure not to use these garden tillers and cultivators while you're distracted, be careful while listening to music. These machines are so powerful you don't want it to accidentally destroy something while you aren't looking.
Be sure that you don't overestimate the abilities of your tiller if you are going with a mini cultivator as they are not suitable for dealing with large rocks and tough roots. For smaller rocks and roots you should be fine.