As above ,the vp2 will be my next charger,its not the cheapest but its a great charger.Also can charge 3.8v cells(4.35v) come the time you "might" decide to try.So future proofs it a little too for you investment.........
Want cheap and does the job.....the i4 is good value,not as good as the xtars but has 4 bays,not quickest charger but does the job and stops charging as it should.
I have a wp6 charger(6 bay) also good value imo,again not best AT 650ma charge rate, but good enough for me
Single bay i have an sp1,this allows 3.8v charges and has similar options of 0.5A, 1A and 2A charge rates along with 3.2/3.6/3.8v settings.........