Have a read through this thread -- very helpful-- full of other peoples load orders and mod suggestions:
http://www.subsim.com/radioroom/showthread.php?t=173193
But here's what I'm using at the moment -- seems pretty good, but I'm a noob. I'm sure someone with more experience will help you along too
Generic Mod Enabler - v2.5.0.150
[C:\Ubisoft\Silent Hunter 5\MODS]
Accurate German Flags
Grossdeutscher Rundfunk (I also bundled a few extra radio stations with this mod)
Capthelms audio
sobers silent hud
sobers no footstep sound mod
Terrain_harbour_flags_Mod_v1_2_1
Lite Campaign LC 1.2
Shadow Improvement Mod
MightyFine Crew Mod 1.2.1 Alt w beards
Environment 3.1
sobers base wave mechanics for SH5 v3
RemoveLogoIntroTheDarkWraith
NewUIs_TDC_3_9_3_ByTheDarkWraith
MRP 1.3+OPCF light
NewUIs_TDC_3_9_3_alt_officer_wounded_by_naights
NewUIs_TDC_3_9_3_No_Color_Dashed_Contact_Line
NewUIs_TDC_3_9_3_No_Contact_Colors
NewUIs_TDC_3_9_3_No_Contact_Tails
NewUIs_TDC_3_9_3_No_Hydrophone_On_Surface
NewUIs_TDC_3_9_3_Sub_Warship_Merchant_Same_Shape
SteelViking's Interior Mod V1.1
NewUIs_TDC_3_9_3_ERM_Reaper7_NightVision
MRP 8x5 patch
NewUIs_TDC_3_9_3_6x_6x_7x_RAOBF_patch
sobers talking conning crew mod
BRF 1.3 full
BRF 1.1 HP balance
IRAI_0_0_15_1_ByTheDarkWraith
AilMoon 1.5
NewUIs_TDC_3_9_3_Waypoint_Contacts_No_Symbols
SteelViking's Interior Mod V1.1 patch V1.1.1
Medals & stuff (This is part of Conuses(?) graphic mod that I ripped apart myself)
Window_Lights_Redone_V1
Possible CTD Fix
MCCD_1.04_MFCM_1.2.1_compatible
SD_MapCourseLine_tiny_arrows_ocred
SD_map_colours (edited a bit to stop conflicts)