I have never sold electronic kits, and I don't know kits in the less that $1,000 range. I would recommend reading online reviews of certain kits as well as playing them in the store. I feel that Yamaha
kits are good, but I don't have exerience with inexpensive Yamaha
kits. I believe that other brands are good too if what you want to do is play grooves and fills as you learn to play.
Buying a practice pad and taking lessons is still a great alternative to buying a set. Wish I could help more.