The Opus is a great charger and I wouldn't ever get rid of mine but unfortunately it will not auto discharge to storage voltage so you would have to manually monitor it and pull them. However it would be significant a step up from the VC4. Right now as far as I can tell the MC3000 is the only non hobby charger that has an actual storage mode that will discharge to the proper voltage unattended. You can also use the discharge mode and set whatever cut off voltage you want and it will do it unattended as well.
The MC3000 is the most versatile advanced charger/analyzer out there IMO. Yes it is more complicated, expensive and has a greater learning curve than the other chargers but it does so much more! It will be the last charger you ever buy for cylindrical cell battery's. Don't sell your self short on being able to operate it. If you like computers and gadgets, have a little patience and are willing to sit down with the manual and practice you can master it in no time. You have this forum for help and there are lots of Youtube videos. The manual details every mode and setting and a forum member has made a nice cheat sheet for us.
I suggest you download the manual and study it first to get an idea of what it will do. Watch the videos (search SkyRC MC3000 on youtube) and remember it will be easy when you have it to practice on. It does have a "dummy mode" that operates as easy as say the Opus and other less advanced chargers to get you started. As you study up on it you will find comments about teething problems found on the early models but they have been corrected on the latest production ones. I love mine and if I had bought it before the other chargers I have I wouldn't need or own any of them. If you really get into flashlights and battery charging you might as well spend the money on the best now and be done with it.
If you decide to buy one I will direct you to a distributor here in the US who will handle any warranty issues immediately and will give you an as good or better price than you can get on the China sites. $80 plus what ever the actual USPS shipping is from Ca. It will arrive in 2 to 5 days depending on where you live instead of the 3-4 weeks or more from China with basically no warranty. I got mine to my door for $85. He also sells the Opus if you decide to go that route.
All of the above is my opinion and I have no connection with SkyRc, Opus or the above seller. I just appreciate fine electronics and enjoy helping others do the same. Link to the factory MC3000 manual:
http://www.skyrc.com/index.php?route=product/product/download&download_id=168