All quallitative reasons.
1. Peanut butter and other things you may need to scoop out with a spatula...less crap on hands digging in there. I make PB every week in it and love the wide container. Same goes for hummus.
2. Fits under counters. Never thought this was a big deal until I realized I use it 1-2x/day and its nice to have it there (+ the ego bumps from visitors noticing your blender)
3. backwards compatibility. The newer models will take either type of container, but the older models will not let the new wide containers fit on them. This is like Xbox360 being able to play regular Xbox games, but not the other way around. Future proof yourself a bit.
4. I dont know if there is a capacity difference, but I feel like I dont have to "add" ingredients much once its running...like ingredients just stuff in it nicely, hit the button, and ta-da.
5. newer ones with the wider containers have slightly more powerful motor (verify that). I also think all new models are all wide containers actually.

Don't think you can go wrong with any of their models, but knowing you might have it for 30yrs the dif between a $350 and $500 machine isn't that big of deal. Good luck, easily one of the best purchases I've made and I was skeptical going in.

This might be up for the most ridiculous thread of the year... I think we have a new "my coach fired me" thread

X1000

Does adding water cause a lot of nutrient loss?

What about keeping it in a somewhat frozen slushie state?

So I should turn the light bulb off in my fridge because light causes nutrient loss in smoothies?

Should I cuddle with my smoothie at night and rock it to sleep?

I know us triathletes are Type A OCDs, but sweet jesus man, relax and enjoy your smoothies.

If blending/water/mixtures destroys nutrients, imagine what your stomach acid would do to it....

This might be up for the most ridiculous thread of the year... I think we have a new "my coach fired me" thread

Since there is no pink text I am going to go at these 1 by 1. Just for shits n giggles.

1. No, it just waters it down. Duh

2. If it weren't in a slushie state it wouldn't be a smoothie it would be juice.

3. No, dumb ass, the light goes off when you shut the door. Did you honestly think the light stays on? Not that it would matter if it did.

4. Yes, preferably not in a cup of any sort. You can be the big spoon.

Ok I feel better now.

Lol but the light is on when the refrigerator is open....what do you mean it turns off. There must be a Santa.

Do black lights relax the nutrients inside smoothies more than bright lights? Is that what you re trying to tell me, that I should buy a black light?