This really depends on your wants and needs. Considering I have had my EVO V 4G since the release date the only complaint I can make about it is the infamous "Error 64 Radio Error." Everything else about the phone I love and wouldn't trade it for anything else (4.3'' super lcd display, 1.2Ghz dual core cpu, etc etc). I came from the Motorola Triumph which was plagued with issues, I believe I went through 4 or 5 Motorola Triumphs before I actually got a keeper. The 3D is a somewhat nice feature, I found myself playing with the 3Dness a couple of days after I purchased this device. Now I don't even mess with it after awhile it makes my eyes and head hurt. As far as it's "4Gness" your going to get mixed opinions as Sprint's WiMax 4G network will vary from user to user. On my own experience 4G isn't a necessity most areas WiMax won't penetrate into homes or businesses. The only 4G is on street level meaning being outside is the only way I can pick it up, so I hardly find myself even turning 4G on. If I want a fast connection to the internet I'll use my WiFi instead when I am home. I can't give an opinion on the HTC One V I considered this phone as it was rumored it was coming to Virgin Mobile, but I did more research and heard rumors the EVO 3D was heading to VMUSA as well so I waited it out with my Triumph once I saw the EVO 3D was available to preorder I jumped all over it.
EVO V 4G Likes

Fast snappy 1.2Ghz Dual-core chip (Qualcomm MSM8660 Snapdragon) w/ Adreno 220 GPU
Large 4.3'' Display
1GB RAM (Note due to OS available RAM floats around 800MB)
Android 4.0.3 Ice Cream Sandwich w/ Sense 3.6 UI
Dual 5MP cameras w/ dual LED flash
720p HD video capability in 2D and 3D mode
1.3MP front facing camera for video calls etc
Device feels solid in your hand
Great line of accessories for the device
1730mAh battery <------ I can get 24hrs+ out of the battery depending on how I use my phone on a daily basis
EVO V 4G Dislikes

Annoying Error 64 Radio Issue
Dropped calls or calls not going out due to Error 64
No dedicated HDMI port
2D to 3D mode switch feels cheaply made