This is no insult to the 150,heck i ran one a while. You have an entry level,perhaps beyond unit all ready. As a back up if you could score a used 150 for a third of what you are looking at and you have no desire to upgrade fine. If you are going to keep detecting a long time start a fund for your next upgrade.
Ten loonies a week (o.k. twenty cause of winter) recovered with your f2, or the balance come up with each week by sheer goal setting and action will have you upgrading ina little over a year to four times all most a detector. If your considering learning a new unit,make it worth while and not frequent if possible.
The 150 money your considering can be banked to help on short weeks goals. Whatever you decide have fun. H.H.!