I don't buy the special HE soaps, For 1 they don't have it available in the brands I like and I can't stand TIDE and that seems to be the main soap with HE. I use regular soaps, take out the insert for powders and put powder soap in the soap dispenser as usual. I have had my washer over 2 years and haven't had problems with it. I have bought the color safe liquid bleach that has oxy clean in it for special stain loads. I don't think it will hurt to put it where the soap goes. The main thing about HE soaps is that they are more concentrated and use less, it doesn't mean that the only soap you can use in your washer is HE.
I prefer Arm and hammer liquid soap, It is a lot cheaper and clothes smell fresher.
I am not excited about my front loader though, I think my last washer washed stains out a lot better. I have to actually pre treat just about every little stain for the front loader and some of them still don't come out. My 15 year old Kenmore outwashed this frontloader anyday. In fact I gave the washer to my parents and plan to take all my stained clothes to their house to wash them to get the stains out. I had friends bring their baby formula stained clothes over because their washer wouldn't wash the stains out well and that kenmore got them out. I didn't see a difference in the water bill at all which was the main seller of it and my other washer held more clothes even though we bought the largest capacity front loader in the store so now doing 15 loads of laundry a week.
I do like the dryer as it dries the clothes quicker.
You will figure out how much soap is too much as front loaders use less soap.