If you're stretched on budget but want to expand a bit beyond the Alesis and Roland models you mentioned, you might also consider looking at Yamaha's DTX series. Specifically, the Yamaha DTX452K could be a solid alternative. It offers a good balance of quality and cost-effectiveness with features that are competitive with higher-end models. The kit includes a real kick pedal and a kick pad which add to its realism - something not always found in this price range.
Also, think about what your goals are with the drum kit. If it's primarily for practice purposes at home, nearly any of these kits will do. But if you are planning to use it for gigs or performances, ensure the module outputs and overall sound quality will meet your needs in louder environments.
Lastly, don't ignore used options! Sometimes you can find high-quality kits like Roland TD-11 or even slightly older flagship models like TD-15 within an affordable range second-hand. They often arrive well cared-for and can provide excellent value for money while offering more advanced features than buying new at similer prices.
Remember, electronic drums can feel different from acoustic kits, so whichever brand or model you choose, ensure it suits your style of play and feels comfortable under your sticks. Happy drumming!