What do you think about Bichon Frises?

Well, currently we have two Staffordshire Bull Terriers, who I love to bits but I will be devastated when they are gone, they currently are 6 and 7, soon to be 7 and 8. My mum said they will be around for a few more years yet, as the average age for a Staffie is around 12ish. But despite this, I have always longed for a puppy of my own that I can train, and show. But by time I am allowed to get another dog, which with no doubt would be the longest a year after both my dogs have gone :(, I wanted to know whether a Bichon would be right for me. So a bit about me; I have quite a busy lifestyle as I have lots of homework to do, as I go to a grammar school, I would have time to walk a dog everynight, and I dont really do much at the weekends which was when I could train it and groom it. My family is no stranger to vet bills so this would be no problem, as I have grown up with dogs and recently we have had two expensive vet bills, both being my youngest dog, nearly dieing after attaking another dog that came on to our territory, and then her eating slug pellets to which she now has fits if she gets to hot. I was reading online that Bichons have a problem with anxitey when being left alone, I dont think he/she would be alone though, as my mum and dad would be more than likely to get their own dog aswell as me. I also discovered, that they arent very good with training as they are a bit dopey <3 , If theyre any good websites or any information you can give me about Bichons, then please let me know, and If you dont think that a Bichon is for me, then do you have any suggestions on a dog that would suit me. We previously have had these dogs; Cleo- A rescue Staffie cross, died of cancer. Scooby-Dalmation, was sent away to a farm because he was a nightmare! haha <3 Miss ya scoobs, and now currently Sadie & Brandy (Sadie the oldest)- staffies, and currently still with us, Sadie is amazing, and Brandy is a pain in the bum, Also, I will be moving out after my education so if my dog is still with me, would a Bichon be able to cope with change? Any helpfull answers appreciated <3