To stay closer to your budget and meet your requirements the egg capacity will be a little lower but with all of the table top incubators I have used the Nurture Right 360 and IncuView and my top 2 favorite incubators, they're both plastic, and both have a horizontal autoturner included in the design. It's also nice because they also both have a wonderful viewing window so you can see what's happening during the hatch even when you can't open them.
Now would actually be a great time to pick up a Nurture Right 360 at Tractor Supply because if you're part of their Neighbors Club they should have emailed you a 15% off coupon yesterday and they do carry them in most stores.
If you decide a higher capacity is more important to you, then I would suggest a Hovabator. It's a styrofoam incubator but it will hold twice as many eggs as the other 2 incubators I mentioned. An autoturner can be purchased to fit in them as well, I usually find that the Little Giant autoturner is less expensive than the Hovabator one and they both fit perfectly inside the Hovabator.
Everyone has their favorite incubators and with a little research you can even make your own incubator out of something like a cooler. Below are all of the incubators I have used or worked with closely in the order of favorite to not worth it.
1. Nurture Right 360
2. IncuView
3. Hovabator
4. Farm Innovators
5. Little Giant (hit or miss with these but I had an old hand dial model that worked well)
6. Yellow top China-bator (often no name brand and avilable very cheap, DO NOT BUY THESE, they're terrible)
Brinsea isn't on my list because I haven't used them personally but they also make very reliable incubators and if you want to make the $$$ investment they do have higher capacity plastic incubators.
Happy hatching!!
