I have a Janome Memory Craft 3000. I like it alot and did haveproblemswith the bobbin case, but the repair man put in a larger case 3 yr ago and it has been working fine since. I watch that it stays threaded correctly as at time the thread goes off the front track. The bed is average size and janome now sells a larger bed that handles quilting much better. I am postponing buying another machine at this time.
I also have a Simplicity machine and rarely use it. I don't advise a cheap machine from a discount store as you may end up paying more in repairs than the machine is worth. Good luck