I think that DmLite and roland that you have mention are very entry level drum.
In past I had alesis dm6 and it is really basic drum. The module is horrible, bad quality sample, no trigger adjust (sensibility, threshold, gain...) and the pad are all 8".
You should consider to buy a better drum with a little more money.
A dm8 is a great choice (choke on crash, dual zone ride, snare 10"). There is also the "pro" version with pad in mylar.
The dm10 is absolutly a great product. The studio version is smaller (10" snare + 4x8"tom) the X version is fantastic with 12" snare, 2x10" tom and 2x12 floor tom with the feeling near to the acustic drum...