lighest tank i think is the safer and fuel bottles, crazy light so may feel similar to your old stako but have a longer life.
Personally however i love my guerilla bottle as it quite light but looks amazing and is solid (i'm mr butterfingers) but i found the regs to be unreliable (one came with bottles, broke, techs couldnt fit, bought another, sae problem) so i moved onto a nina pro reg which unlike the guerilla fits every gun i have tried and you can loosen part of the collar to swivel the dial and fill nipple so they are how you like them on every set up which i find very very very helpful!!!