Storage for VPN access

Hi all

I've moved far away from my home now, and accessing all my files from my home. Need your advice on what is best way to get access there.
OMV runs at HP Microserver G7 under EXSi 5.5. Memory ain't a problem, but CPU power may be. Mikrotik x86 running next to it.

I got an IPsec connection up and runninng. Not that I totally satisfied with network performance I get though.
One side is 50 meg, anoher is 120meg(speedtest says so). Public IP both sides, but clients behind a NAT(port forwarding works for IPSEC)

1. NFS vs Samba? Which will give me better resuls? What is easier to tweak for VPN?
While at home I don't really care with 1 gig link, but being overseas it makes sense.
2. Putting some service outside of VPN? Wise idea? Doesn't look so to me. I'm running Subsonic, but this is only music.
I didn't found any authorization in NFS, but i wasn't searching alot.
Samba asks for user/pass, may be I cann add some cert to it.
3. Tweak something? Any other ideas?

Will take a look on webdav or owncloud/syncthing

Any advices on what to choose? Guess Syncthing will create a copy of data on my harddrive, not just give me access on demand, right?

Tried webdav server with cyberduck client.
I'm getting about 500-700KBps(~4mpbs) via ipsec tunnel and 700-800(6mpbs) when port exposed to the internet.

Looks like my connection on remote side sucks, it shows about 50 megs, but I'm on the other edge of the earth at the moment.

Believe it will be faster to ship harddrives by mail 10TB in 10 days.

I get something like this:

root@omv:~# speedtest-cli --server 1088
Retrieving speedtest.net configuration...
Retrieving speedtest.net server list...
Testing from JSC Kazakhtelecom (95.58.184.131)...
Hosted by Kazakhtelecom (Almaty) [874.41 km]: 71.829 ms
Testing download speed........................................
Download: 66.31 Mbit/s
Testing upload speed..................................................
Upload: 58.77 Mbit/s
root@omv:~# speedtest-cli --server 1168
Retrieving speedtest.net configuration...
Retrieving speedtest.net server list...
Testing from JSC Kazakhtelecom (95.58.184.131)...
Hosted by Kazakhtelecom (Astana) [839.24 km]: 80.442 ms
Testing download speed........................................
Download: 56.41 Mbit/s
Testing upload speed..................................................
Upload: 51.78 Mbit/s
root@omv:~#

The problem is that I'm on the other side of the Earth. Or omv host. Depends on how you look on this.
Either way, quite interesting puzzle. How to increase speed between two points.

I know I won't get it waay better then it is now, but wanna choose an optimal way.

I'm in US.
Server is Kazakhstan(it looks like Russia though)

May be I need to build a new server fast and start rsync/syncthing/whatever. This might be finished by now if I staered a couple of weeks ago.

Well, if not takins speed into account there's many ways to send data across a globe.
I got mikrotik routers here and there(remote is x86@vmware) and there's built in bandwith test tool. Don't know if I can believe it, but it says: ~15-20Mbps in 10s average. Total average is 15+Mbps. That's for TCP protocol. UDP show even better figures.