I have a Tozer which is very sturdy and which I would definitely recommend but possibly would cost more than you want to spend at the moment. However, for this type of purchase it’s worth considering the purchase on a price-per-use basis as a good stool may well last you 20 years or more ! I would definitely go for adjustable. Storage sounds nice but makes the stool a bit top heavy if you move it frequently. Also think about the covering — dralon will need replacing after a year or two so make sure this will be possible for you to do easily. If you are looking for one, check piano bench at musiciansfriend.com.