Take a look at Strasser Woodenworks. I have one of their 48" vanities and a matching overjohn. They do have matching tri-view medicine cabinets, and you can choose from a variety of styles and finishes. Link - Strasser styles & finishes Link - Strasser medicine cabinet examples

It looks like you have knotty alder for cabinets. These are natural coloured (light gold in tone) wood cabinets. That means you want to work with things that work with natural wood tones. The other thing you need to worry about is how BUSY the wood is. That means you want to work with counters/floors that are CALM (ie. not a lot of movement; not a lot of UMPH in the visual). Only ONE THING in the kitchen should have that "kick in the gut" impact (visually). The high-impact item you already HAVE = cabinets. Good. Now that has been established we can MOVE ON to the next thing: colours. Light gold wood likes to work with 3-4 "colours". The #1 = White (white counter tops...just like you have there...you would be replacing "like for like"). With a white counter you would look at white or very light flooring (just as you have already = another like for like replacement = not much of change for all that money spent). The #2 = Black. A black counter top (like Uba Tuba = black with hints of green in it) can be used to really set off the light tones in the wood. The easy-peasy floor choice would be (you guessed it) black. Ouch. This can be stunning - but VERY hard to live with. I do NOT think this is an option for you. The #3/#4 options would be BLUE or green (personal choice for colours makes blue more viable than green and vice verse). I personally LOVE blue with light gold wood. I love a blue slate (counter tops AND flooring) with a country-style wood kitchen. This is a great way to get a modern country feel (sigh...yes your kitchen is country in style...there is no way to change that without changing the cabinets). The BEAUTY in using blue slate is it works NICELY with gray. Gray and blue are often compatible (assuming the gray you choose has blue undertones). If you work with green, you will need to rethink the carpet and the paint. See how much fun this is? This is why Sophie suggests a designer. Personally I would go with blue slate. It has LOW visual impact. It is simple and timeless and it will EASILY support a modern country kitchen....it also works very very well with gray (again, watch your undertones in the paint/carpet...do NOT work with beigy tones...it will get ugly in a hurry).

I think we have the same tile. Do you remember what yours was called? Can't find it. The lighter color

Bathroom vanities aren't that deep, usually about 21 inches. Kitchen cabinets are deeper, about 25 inches. Do you want it to be closer to 27 inches deep? Home Depot and Lowes have base kitchen cabinets in "unfinished beech". They come in multiple sizes, some for a sink, some with drawers so you can mix and match and they are ready to be stained or painted any color. They're about $80-$110 depending on the size and if it has drawers.