front or top
First of all, welcome! I am fairly new here myself, and have been made to feel very welcome - as I am sure you will be, too.
Top or front is a very hotly debated question.
There are so many different types of top loader today, but let's just talk about the "classic" US type with an agitator in the middle.
Front loaders in the US right now seem to be locked in a mad race to see who can use the least water, never mind cleaning clothes, so let's talk about their European cousins.
FL take 4 to 5 times as long to wash, rinse and spin. Their slow heating of the water and long period of tumbling is exactly the washing pattern which oxygen bleaches and enzyme detergents (that is, modern detergents) need to clean their best. They also rinse several times and spin 3 times faster then the US top-loaders, eliminating most of the water and getting an awful lot of residual dirt and detergent out.
Their energy consumption is, despite the longer wash time, less than TLs because they use much less water and the drier clothes need 1/2 as long in the dryer - the real dollar eater.
This takes a good 30 minutes off their longer wash times, but they still take a very long time.
They use way less water to wash the same amount of clothes. This doesn't mean much to folks on the east coast, but in the west where water bills are often hundreds of dollars in the summer months, this could make the decision easy.
As I said though - they take much longer to wash. My LG needs over 1 1/2 hours to do a normal load.
Some people argue that FLs can wash more than a TL at one time. This is not true. They can wash bulky things like pillows and comforters (sleeping bags especially) which TL can't. But their real capacity is always set about 20% lower than their rated capacity by all independent testing institutes.
Top Loaders have a time advantage. They are easier to load and unload. Some have a gentle agitation which makes them suitable for real hand-washables, but most are too aggressive.
They usually do a much better job with cat and horse hair then FLs do, but they all do an incomparably worse job with sand than FLs do. In fact, if you have trouble with sand, you pretty much have to buy a FL.
If you have trouble with animal hair, forget FLs, get a TL with a good filter.
The truth of the matter is, TLs have never been popular anywhere except the US/Canada and to a lesser extent Australia. Everybody else in the world prefers modern FLs because energy and water cost so much outside of the US that the time question doesn't even matter.
I don't know why US manufacturers stopped making such wonderful machines as the Frigidaire pulsators. They had all the advantages of agitator based TLs but used much less water, were much easier on clothes, cleaned much better, spun out more water and were much sturdier and better built than anything US makers have on the market today.
Maybe that's the reason? The US manufacturers today aren't interested in anything but short term profit.
If I had to buy a new machine in the US right now, I would find a traditional Frigidaire (maybe not a rollermatic

. If it had to be new, then I would buy an LG or Miele front loader. I don't like replacing things every three years.
Hope that helps a little. Other opinions?