I have the 5 Quart mixer. Love it. Got it as a wedding present 20 years ago. We have a family of four and this size works fine for us. I use it for mixing cakes, cookies and breads. I never use any of the pasta attachments but I know they are available.
A few things I would consider.
If you have a large family, you might want a larger mixer. And if you bake gobs at a time, you might want a larger one. Mine is perfect for 4-5 people. I probably haul it out once a month. It is a manageable size and the bowl fits easily into the dishwasher. My neighbor with 7 kids chose a larger size than mine and it is in constant use.
I love my mixer but I wish it was a more timeless color. Mine is the dark blue - and it still looks and runs as good as the day I got it. But a few years after I received it, I changed my kitchen and I regretted not having the red. Now I have a stainless kitchen and the blue goes with absolutely nothing in the decor. I keep it in a cabinet instead of on the counter. If I had gotten stainless or black or white it could have gone with any decor.
Which brings me to the third point. Where are you going to keep it? On the counter or in a cabinet? If in a cabinet, be sure to measure your cabinets. The thing is pretty tall. it is also heavy and can be awkward to carry. (Mine doesn't fit in my kitchen cabinets and i have a custom kitchen so that was bad planning on our part). My father (bless him) built me custom shelves in an armoire and that is where it now lives.) If you want it on the counter, then the color becomes all the more important (well, if you care about things like that - you may just want a kitchen workhorse and color might not matter at all).