(Mod's: I know this may be a double thread, of you could delete my previous one that would be fine.

I just bought my first home this past February which needed a bit of updating. The house was built in 1964 and is mostly all original. Besides the basics, I've redone the kitchen myself (new tile floor, new cabinet doors/drawers and sprayed cabinets)....My house is built on a concrete slab and I'm right near the water on the south shore of Long Island with many canals/etc. in the area.

The second floor of my house is the original hardwood from 1964 which I'm guessing is Oak (or Red Oak, how do I tell exactly?) with a typical/generic golden finish (not quite natural or gunstock but the typical in between finish). It is a 2 1/4" wide plank...The first floor entryway currently has slab tiles leading into ugly blue carpet. I'd like to rip up both floors and put down hardwood in the entire area. It's just over 400 sq. ft. at 32'x13' (gets narrower in sections, etc)

After some research, it seems like engineered hardwood would be my best bet. I'd like to go right over the slab to keep the height down. Any and all help & recommendations to a newbie would be appreciated...

Should I lean towards lock & fold or T&G w/ glue? Or go glue down all together?
I don't mind dealing with glue too much as I did tile the kitchen myself. Which application would I get the most bang for the buck?
I'm trying to stick with a $4 or up to $5 sq. ft. budget
Are there any brands that I should try to stick with?
What do you think about some of the lines that Lowes carries such as Bruce, Natural Floors by USFloors, etc? I did take a look at Bruce # E2106 which is a 3" wide Butterscotch Oak lock & fold plank that was recommended by Bruce after speaking w/ their tech line. Lowes had it in stock but after looking at it, it looked to be many ply's with a VERY thin veneer. Is this what I'll be dealing with in my price range?

What about Lumber Liquidator's Schon, Mayflower, Virginia Mill Works?

What type of prep. and underlayment should I go with over the concrete slab?

I'm definitely a 'do it once and do it right' type of guy and I'll be in this house for the foreseeable future, so I don't want to skimp but would like to keep my budget in check.

I would go with a glue down engineered. You will want to check the moisture level of the concrete prior to gluing though. You can find moisture tests online. I would look for a product that has a thick top layer. Thicker means the floor can be refinished more times in the future.

if you want to do it right don't use engineered flooring. Atleast get prefinished if you don't want anything sanded. Engineered, once its down it's down.. generally once it wears you have to replace the entire floor again. Sellers claim you can have it resanded depending on brand up to 3 times... That is one of those "yah you tech could but it will look horrible" simply because 99% of the time the scratches are deeper than your allowed to sand off (assuming your looking at the 1/8" of real wood rest is fake type). Every type of engineered has it's downfalls but atleast if it was solid it's easier to repair and you can still have it resanded down the road when it gets beat up.

You can easily get prefinished or unfinshed with sanding withing that price range. If your going over concrete slab you'll have to use adhesive unless you did a floating engineered floor =\