Need to upgrade d3100?!

I have had my nikon d3100 for a few years now and ive collect a fair few lens, (18-55,55-200,10-20,50,35,12-24 ) it has served me well but it has started to break a bit on me now from use in the rain and dirt etc, christmas is coming up and im thinking about upgrading the body, I'm travelling in Europe for 6 weeks over christmas in 2015 and I'd love a new body to take with me and give me new options, as much as i'd love the d7100 its a bit pricey and its hard to find 2nd hand ones in a small city(WA)

so I thought the d700 looks quite good and its weather sealed which is a HUGE bonus because of all the snow etc, I was then comparing the d7000 to other cameras and the d5300 caught my eye, my mum has the coolpix p600 which has the same wi-fi and flip lcd as the 5300 and they look quite useful as I like the share my photos on social media and have the GPS, plus the flip out LCD would have handy when getting down low for different angles of structures, plus its newer, what would you suggest, I have read that the d7000 is a solid camera and looks really good but I cant choose which one, I will probably shoot mostly landscapes but I do bring out the odd 50mm to get some street photos, open to suggestions! If I got the d7000 quite cheap I might have enough left over for a lens or should I just try and go for the 7100? I want this next camera to last and wont feel like I need an upgrade anytime soon and because its just a hobby im not going to go full frame any time soon

Read more: Need to upgrade d3100?!

Is the Coolpix S800c capable of producing photos for a good quality 8x10 print?

We send all of our photos to walmart for printing if that has any effect on quality or not. I read that it's not all about megapixels (this one has 16) and that dpi and ppi play a role as well.
For example:
Dimensions 4608x3456
Width 4608 pixels
Height 3456 pixels
horizontal resolution 300 dpi
Vertica resolution 300 dpi

Would these numbers be acceptable for a good quality 8x10 photo? Thank you for your help!

Read more: Is the Coolpix S800c capable of producing photos for a good quality 8x10 print?

Nikon - Coolpix 10.0MP Digital Camera- s550?

What do you think of that camera
Added (1). Can record videos
Added (2). I meant can it record vidoes?

Read more: Nikon - Coolpix 10.0MP Digital Camera- s550?