Ooohh... Angelgotchi, good choice. I like the vintage vibe it gives off.
Yes, there is a 4U+.
I do recommend buying a color tama. I was in your position... 2 months ago? Something like that.
I wasn't sure about getting a japanese tama as they seemed... well, intimidating.
I'd like to mention that the 2 you're talking about (4U or P's) are very different.
I'll help you answer by asking some questions:
Price range?
4U is actually VERY cheap right now for a new one.
https://www.amazon.com/TAMAGOTCHI-4U-WHITE-Tamagotchi-White/dp/B00LGBMSMK/ref=sr_1_1?ie=UTF8&qid=1459612470&sr=8-1&keywords=tamagotchi+4u
P's is almost double the price.
https://www.amazon.com/Bandai-Tamagotchi-Ps-Green/dp/B009IE164I/ref=pd_bxgy_21_3?ie=UTF8&refRID=1AAPA14SM1W23XV9SX9W
What do you look for in a tamagotchi?
Simplicity and pet-like? (4U)
Or complex and human-like? (P's)
Also, do you have any infra-red or NFC devices?
If you have a nexus 7 tablet (2nd gen.), you have the ability to download TONS of content to your 4U, and mr.blinky even made a 4U app in english.
https://mrblinky.net/tama/4u/app/
If you have a irda usb or palmtreo or some sort of infra-red thang, you can patch your P's into english (thanks again mr.blinky!) and download new content.
https://mrblinky.net/tama/ps/english/
If you have neither, than the 4U without downloads is pretty simple, but still has plenty to do. The P's comes with lots to do without the downloads, so it just depends on your taste.