I have to say. First, do you have the experience to use conventional and non-conventional therapy. If yes. I suggest to take a good look at the VN 500 from Draeger. It will do all therapy with one piece of equipment. nCpap, conventional, HFV and oxygen therapy like high flow NC, oxyhood and heated trach masks. We been using them for a year and happy. No more 3100A, no more changing circuits if HFV needed or changing out of equipment. I feel our really sick babies benefit from this. We don't need to disturb to change to non-conventional mode, not to mention the cost of changing circuits for the 3100A. If looking for basic then Drager babylog 8000 with VG option. Good luck.