I would advise test-riding the Salisbury LPX first though, (which you appear to have done), - as its 'genteel' speed may disappoint; although it meets my needs for the moment.
Here's a bit where I've rattled on about it:
http://www.pedelecs.co.uk/forum/electric-bicycles/2894-got-myself-powacycle-salisbury-lpx.html
An external review:
Bike Test: Powacycle Salisbury
Another out of date review with the older 'inferior' NiMh battery making the bike heavier for one, (but I enjoy reading it):
http://www.powacycle.co.uk/PDF/Our Friend Electric - Salisbury Electric Bike Test.pdf
It's a bike that should be viewed as inexpensive enough to allow upgrades, the gear sprocket range, longer seat-post if you're tall, (then no need for the quick release on the seat-post to gain speedy access to the battery; I've fitted a seat-bolt instead, for peace of mind when parked up and out of sight).
However - it IS reliable, and no matter what your weight it delivers a very good range per battery charge - top notch mileage and no mistake. Contrary to what I've posted elsewhere, unless you force it into mountaineering duties, it will handle most civilised hills - but not those cliff-faces I've been subjecting mine to. (I'm training it
in readiness for it's new Megarange sprocket; it's already migrating in looks away from its original looks what with bar-ends and foam grips, and giant-size seat-post).
I guess what you're asking: which is the best bike per price range? When really it should be which is the best bike for my physical condition and needs. When you read enthusiastic reports by those who've found an e-bike that suits them like a fitted-glove you might think: that's the one - but read later posts and you'll find posters who have sold said same bike for another type entirely. It's a quest, and the best advice appears to be: seek out test ride after test ride - if travel distance allows. My bike doesn't fit me as it comes from the manufacturer; for the moment I'm adapting it to suit as best I can; the quest continues...